firebase hosting not passing to firebase function despite re-write

Question

Full repo: https://github.com/jmsherry/firebase-full

firebase.json

{
  "hosting": {
    "predeploy": [
      "npm --prefix webapp run build"
    ],
    "public": "webapp/build",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "rewrites": [
      {
        "source": "/server-time",
        "function": "serverTime"
      },
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  },
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  }
}

I'm trying to my functions to work with hosting. The function is available (url: https://europe-west2-full-firebase-efc5a.cloudfunctions.net/serverTime) but The re-write for the server-time function works locally but when running on firebase hosting it 404s and redirects to the homepage (url: https://full-firebase-efc5a.firebaseapp.com/server-time)

It's like it's not being sent through to the function on firebase's end!

Can anyone shed any light?

Doug Stevenson Doug Stevenson · Accepted Answer · 2020-11-10T17:25:52

It looks like you deployed your function to region europe-west2. Unfortunately, that won't work at all with Firebase Hosting in production, since it only supports us-central1 for Cloud Functions. From the note in documentation:

Important: Firebase Hosting supports Cloud Functions in us-central1 only.

Consider instead using Cloud Run. It's more work, but you will be able to deploy to any supported region and it will work with Firebase Hosting.

firebase hosting not passing to firebase function despite re-write

1 Answers